package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnum;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.apache.catalina.User;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.naming.Binding;
import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import java.util.stream.Stream;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendCode")
    public R sendCode(@RequestParam("phone") String phone){
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() - l <60*1000){
                //60秒内不能再发
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(),BizCodeEnum.SMS_CODE_EXCEPTION.getMsg());
            }
        }


        //TODO 1.接口防刷

        //2.验证码的再次校验。redis
        String code = UUID.randomUUID().toString().substring(0,5)+"_"+System.currentTimeMillis();
        //redis缓存验证码，防止同一个phone在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,code,5, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone,code.split("_")[0]);
        System.out.println("发送成功");
        return R.ok();
    }

    /**
     *  //TODO 重定向携带数据，利用session原理，将数据放在session中。
     *          只要跳到下一个页面取出这个数据之后，session里面的数据就会删掉
     *  //TODO 1.分布式下的session问题
     * @param vo
     * @param result
     * @param redirectAttributes 模拟重定向携带数据
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        //前置校验
        if (result.hasErrors()){
            Map<String,String> errors = result.getFieldErrors().stream().collect(
                    Collectors.toMap(FieldError::getField,FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors",errors);
            System.out.println(errors);
            //Request method 'POST' not supported
            //用户注册 ->/regist[post]---->>转发/reg.html(路径映射默认都是get方式访问的)
            //为避免重复提交表单数据，应该用重定向
            //但是重定向就获取不到请求域的数据，不能用Model 用RedirectAttributes

            //校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }
        //真正注册，调用远程服务

        //1.校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                //删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过。  //真正注册，调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode()==0){
                    //成功
                    //注册成功回到首页，回到登录页  /代表以项目的域名路径为准
                    return "redirect:http://auth.gulimall.com/login.html";
                }else {
                    Map<String,String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else {
                Map<String,String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes,
                        HttpSession session){
        //远程登录
        R login = memberFeignService.login(vo);
        if (login.getCode()==0){
            //成功
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute==null){
            return "login";
        }else {
            return "redirect:http://gulimall.com";
        }

    }


}
